4 August 2026

Invinity Energy Systems plc

("Invinity" or the "Company")

Invinity Exceeds 10 GWh Dispatched for Customers

Significant performance milestone demonstrates the durability and flexibility of the Company's technology in demanding, real-world applications.

Invinity Energy Systems plc (AIM: IES), a global leader in vanadium flow battery technology, is pleased to announce that its global operating fleet of vanadium flow batteries has now dispatched more than 10 GWh of energy in service to customers.

Above: Chart showing cumulative energy dispatched from Invinity's operating VFB fleet since Q1 2022

This landmark achievement, surpassed in recent days across the Company's installed base of VS3 and Endurium battery systems, demonstrates the ability of Invinity VFBs to deliver sustained, high-cycling performance in demanding commercial applications and represents another significant validation of Invinity's technology. Of particular note is the strong performance delivered by Invinity VFBs installed at the Viejas Resort and Casino in California by Indian Energy. This battery system has recently delivered more than 0.5 GWh of energy since entering full operation and has consistently met and exceeded warranted performance parameters across multiple metrics during this time.

The cumulative volume of energy dispatched by the Company's operating fleet has increased 85% year-on-year, reflecting growing adoption of Invinity technology across a diverse range of grid-scale and commercial energy storage applications. Invinity batteries are deployed at customer sites across the UK, Europe, USA, Canada, Australia and Southeast Asia, with additional projects on track to enter operation in the coming months including the Copwood VFB Energy Hub in the UK, expected to become the largest operating vanadium flow battery in Europe.

Team celebrations of the 10 GWh milestone in the UK (above) and in Canada (below)

Surpassing 10 GWh of dispatched energy represents a significant proof point for the maturity, reliability and bankability of Invinity's technology. Few emerging energy storage technologies have accumulated comparable commercial operating experience, making this growing operational track record a key competitive differentiator. The demonstrated durability of Invinity's vanadium flow batteries, combined with long-term customer support, has helped build a strong base of satisfied customers, generated repeat business and created a solid platform for further expansion within existing accounts.

Jonathan Marren, Chief Executive Officer at Invinity said:

"Surpassing 10 GWh of discharged energy is a major achievement for Invinity and a powerful proof point for the maturity of our technology. Delivered through real-world operation across our global fleet, this milestone reflects both the strong performance of our vanadium flow batteries and the hard work of the team behind them. As global demand for energy storage continues to increase, this unparallelled operational experience gives current and prospective customers confidence that Invinity's systems can perform reliably when it matters most."

Stay up to date with news from Invinity. Join the distribution list for the Company's monthly investor newsletter here.

Enquiries:

Notes to Editors

Invinity Energy Systems plc (AIM: IES) is a world-leading manufacturer of vanadium flow batteries for energy storage. Built in our factories in the UK and Canada, the Company's proven, commercialised, longer duration energy storage technology has been deployed at scale and dispatched gigawatt-hours of electricity for customers across the world.

Invinity's safe, scalable and durable battery technology is a trusted and safer alternative to lithium-ion batteries. Endurium VFBs are engineered for heavy-duty, high throughput applications, they don't wear out, cannot catch fire and are designed to be operated for 30 years or more. Our products address the challenges of our global energy system, unlocking the power of renewable generation by delivering energy storage without limits.

To find out more, visit invinity.com, sign up to our monthly Investor Newsletter here or contact Investor Relations on via +44 (0)20 4551 0361 or [email protected].

About Reach announcements

This is a Reach announcement. Reach is an investor communication service aimed at assisting listed and unlisted (including AIM quoted) companies to distribute media only / non-regulatory news releases into the public domain. Information required to be notified under the AIM Rules for Companies, Market Abuse Regulation or other regulation would be disseminated as an RNS regulatory announcement and not on Reach.